yes, cooking in clay is really good for health. Now a days it became fashion in cities also people started using clay pots as they are becoming health concious
Here is a link of some induction chulla-
http://www.google.co.in/search?q=induction+cooker&hl=en&prmd=imvnsr&tbm=isch&tbo=u&source=univ&sa=X&ei=T372TvjBKsjsrAft2uz9Dw&sqi=2&ved=0CFwQsAQ&biw=1066&bih=802
here is details about- http://theinductionsite.com/how-induction-works.shtml
But in present days cooking fashion trend have come that is cooking in the clay utensil and they feel it is much healthy than cooking in steel utensils
cooking in stainless steel is not going to harm us in any way. But i firmly to cook in iron vessels atleast once in 5 days. You know currently almost 99% of the pregnant mothers are anaemic. It cannot be changed only by diet. I think one better way to prevent this.
